What does it mean to convert a secondary colour into a tint?

Correct answer: Add white

In colour theory, a tint is a hue mixed with white. Adding white increases the colour’s lightness or value while usually retaining its basic hue, so option B is correct. Adding black produces a shade, not a tint. A complement tends to neutralise or dull the colour, and mixing all three primaries does not define a tint and may create a muddy neutral.